来自MSN

Airport ground stops vs. ground delays: What are they and how do they happen?

If you've ever had a flight scheduled to depart during bad weather and get a notification that your flight was delayed or even canceled, it could've been because of a ground delay or a ground stop.
WGAL

Ground stop lifted at Reagan airport after reported bomb threat on United flight

PAUL VAN OSDOL, PITTSBURGH’S ACTION NEWS FOUR. WE HAVE SOME BREAKING NEWS RIGHT NOW. WE’RE GIVING YOU A LIVE LOOK AT REAGAN INTERNATIONAL AIRPORT NEAR WASHINGTON, D.C., WHERE EMERGENCY CREWS ARE ...